JP2017042442A - Display control device, display control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display information properly in a display part based on a state of a device with respect to an eye to be examined.SOLUTION: A display control device includes: determination means for determining at least one of a state of positioning a measurement part including an optical system for radiating a measuring beam to the eye to be examined and a state of focusing the measuring beam to the eye to be examined; and display control means for changing a display mode of a dynamic image that is displayed in the display part, based the determination result.SELECTED DRAWING: Figure 3

Description

  The disclosed technology relates to a display control device, a display control method, and a program.

Currently, various types of ophthalmic equipment using optical equipment are used.
For example, various devices such as an anterior ocular segment photographing machine, a fundus camera, and a confocal laser scanning ophthalmoscope (SLO) are used as optical devices for observing the eyes.

  Among them, an optical coherence tomography (OCT) device is a device that obtains a tomographic image of a sample with high resolution, and is an indispensable device for specialized retina outpatients as an ophthalmic device. It's getting on.

  In order to acquire a tomographic image using an apparatus in which an OCT apparatus and an SLO apparatus are provided integrally, the following procedure is executed. The user aligns the OCT apparatus and the eye to be examined using a joystick or the like while watching the moving image of the anterior segment image of the eye to be examined displayed on the monitor. After the alignment is completed, the user adjusts the focus lens of the SLO device while watching the moving image of the fundus image obtained by the SLO device displayed on the monitor. The focus lens of the OCT apparatus is adjusted in conjunction with the adjustment of the focus lens of the SLO apparatus. Thereafter, the user adjusts the coherence gate by adjusting the reference mirror of the OCT apparatus while viewing the moving image of the tomographic image displayed on the monitor. A tomographic image is obtained when the user instructs execution of tomographic imaging after completion of the adjustment.

  In this way, the type of moving image that the user should pay attention to in the sequence for acquiring a tomographic image changes. As a technique for changing the displayed information according to the type of image that the user should pay attention to, the size of the captured still image and the moving image being observed depend on the fluorescence state after intravenous injection of the fluorescent agent. It is known that the size ratio is switched and displayed (Patent Document 1). Further, in an image processing apparatus that displays a wide-angle-side captured image (2D image), stereoscopic image (3D image), and navigation image (overall image) by an endoscope, the line of sight of a reference person is detected and each image is detected. It is known to change the size of the display area (Patent Document 2).

Japanese Patent No. 4669892 JP 2011-206425 A

  However, according to the conventional technology, information cannot be appropriately displayed on the display unit according to the state of the apparatus with respect to the eye to be examined. That is, the information cannot be appropriately displayed on the display unit in accordance with the adjustment operation of the apparatus with respect to the eye to be inspected before imaging.

  The disclosed display control apparatus includes: an acquisition unit that acquires a moving image of the eye to be examined; an alignment state of a measurement unit that includes an optical system for irradiating the eye to be examined with respect to the eye to be examined; and the measurement light A determination unit that determines at least one of the in-focus states of the eye to be examined, and a display that is displayed on the display unit by changing a display form of the moving image displayed on the display unit according to a determination result by the determination unit Control means.

  According to the disclosed technology, information can be appropriately displayed on the display unit according to the state of the apparatus with respect to the eye to be examined.

(A) is a figure showing an example of composition of an ophthalmology system. It is a figure for demonstrating each structure of an optical coherence tomography apparatus. (B) is a figure which shows an example of an optical system. It is a figure which shows an example of a display screen. It is a flowchart which shows an example of an imaging | photography sequence. (A) is a figure which shows an example of the display screen before completion of alignment. (B) is a figure which shows an example of the display screen after alignment completion. (C) is a figure which shows an example of the display screen after focus adjustment completion.

  Hereinafter, a display control apparatus according to the present embodiment will be described with reference to the accompanying drawings. The configurations shown in the following embodiments are merely examples, and the present invention is not limited to the following examples.

(First embodiment)
[Schematic configuration of ophthalmic system]
FIG. 1A is a diagram showing a schematic configuration of an ophthalmic system according to this embodiment. The ophthalmic system includes an input unit 929 including an ophthalmologic apparatus 100, an information processing apparatus 925, a monitor 928, a mouse, and the like.

[Ophthalmological apparatus 100]
The ophthalmologic apparatus 100 irradiates measurement light to the eye to be examined and receives return light from the eye to be examined. For example, the ophthalmic apparatus 100 includes an OCT apparatus. The ophthalmologic apparatus 100 includes an optical head 900, a stage unit 950, a base unit 951, a joystick 952, and a chin stand 323.

  The optical head 900 includes at least an optical system for irradiating the eye to be examined with measurement light. Specifically, the optical head 900 has at least a part of the optical system shown in FIG. Details of the optical system shown in FIG. 1B will be described later.

  The stage unit 950 moves in the XYZ directions in the figure by, for example, an operation on the joystick 952. Since the stage unit 950 is connected to the optical head 900, the optical head 900 moves when the stage unit 950 moves.

  Base portion 951 is connected to stage portion 950. In addition, a joystick 952 and a chin stand 323 are also connected to the base portion 951.

  The joystick 952 receives an operation from the user.

  The chin stand 323 fixes the subject's chin and forehead.

(Configuration of optical system of ophthalmic apparatus 100)
Next, an example of the configuration of the optical system provided in the optical head 900 and the base portion 951 will be described with reference to FIG.

  First, an example of an optical system provided in the optical head 900 will be described. An objective lens 135-1 is installed to face the subject's eye 107 to be examined. Furthermore, a first dichroic mirror 132-1 and a second dichroic mirror 132-2 are installed on the optical axis of the objective lens 135-1 in the direction opposite to the eye 107 to be examined. By the first dichroic mirror 132-1 and the second dichroic mirror 132-2, the optical path is divided into an optical path 351 of the OCT optical system, an optical path 352 for fundus observation and fixation lamp projection, and an optical path 353 for anterior eye portion observation. Branches every time. The optical path 352 is branched for each wavelength band by the third dichroic mirror 132-3 to the optical path to the fundus observing CCD 172 and the fixation lamp 191. Here, reference numerals 135-3 and 135-4 denote lenses, and 135-3 is driven by a motor (not shown) for focusing adjustment for fixation lamp and fundus observation. The CCD 172 has sensitivity at the wavelength of illumination light for fundus observation (not shown), specifically around 780 nm. In addition, the value of a wavelength is an illustration and is not limited to this value. On the other hand, the fixation lamp 191 generates visible light to promote fixation of the subject. The optical system for observing the fundus may be constituted by an optical system such as SLO or a fundus camera. In the optical path 353, 135-2 is a lens, and 171 is an infrared CCD for anterior eye observation. The CCD 171 has sensitivity at a wavelength of illumination light for anterior eye observation (not shown), specifically, around 970 nm. In addition, the value of a wavelength is an illustration and is not limited to this value. Further, an image split prism (not shown) is disposed in the optical path 353, and a split image can be obtained by deflecting return light from the eye to be examined in two different directions. Since the shift amount of the split images changes according to the distance in the Z direction of the optical head 900 part with respect to the eye 107 to be examined, the alignment state of the optical head 900 part with respect to the eye 107 in the Z direction is the split state in the anterior eye observation image. Detected based on the image shift amount.

  Further, the optical path 351 forms an OCT optical system as described above, and is for acquiring a tomographic image of the fundus of the eye 107 to be examined. More specifically, an interference signal for forming a tomographic image is obtained. Reference numeral 134 denotes an XY scanner for scanning light on the fundus. The XY scanner 134 is illustrated as a single mirror, but performs scanning in the XY biaxial directions. Reference numerals 135-5 and 135-6 denote lenses, and the lens 135-5 performs focusing adjustment on the fundus 107 of light from the light source 101 emitted from the fiber 131-2 connected to the optical coupler 131. Therefore, it is driven by a motor (not shown). With this focusing adjustment, the light from the fundus 107 is simultaneously focused on and incident on the tip of the fiber 131-2.

  Next, the configuration of the optical path from the light source 101, the reference optical system, and the spectroscope will be described. Reference numeral 101 denotes a light source, 132-4 denotes a mirror, 115 denotes dispersion compensation glass, 131 denotes the optical coupler described above, 131-1 to 4 denote a single mode optical fiber connected to the optical coupler, and 135-7 denotes a lens. , 180 is a spectroscope. These configurations constitute a Michelson interferometer. The light emitted from the light source 101 passes through the optical fiber 131-1, and is split into measurement light on the optical fiber 131-2 side and reference light on the optical fiber 131-3 side through the optical coupler 131. The measurement light is irradiated onto the fundus of the eye 107 to be observed through the OCT optical system optical path described above, and reaches the optical coupler 131 through the same optical path due to reflection and scattering by the retina. On the other hand, the reference light reaches the mirror 132-4 and is reflected through the optical fiber 131-3, the lens 135-7, and the dispersion compensation glass 115 inserted to match the dispersion of the measurement light and the dispersion of the reference light. Then, it returns on the same optical path and reaches the optical coupler 131. The measurement light and the reference light are combined by the optical coupler 131 to become interference light (also referred to as combined light). Here, interference occurs when the optical path length of the measurement light and the optical path length of the reference light are substantially the same. The mirror 132-4 is held so as to be adjustable in the optical axis direction by a motor and a driving mechanism (not shown), and the optical path length of the reference light can be adjusted to the optical path length of the measurement light that changes depending on the eye 107 to be examined. The interference light is guided to the spectroscope 180 via the optical fiber 131-4.

  Reference numeral 139-1 denotes a measurement light side polarization adjusting unit provided in the optical fiber 131-2. Reference numeral 139-2 denotes a reference light side polarization adjusting unit provided in the optical fiber 131-3. These polarization adjustment parts have several parts where the optical fiber is routed in a loop, and the loop part is rotated about the longitudinal direction of the fiber to twist the fiber, thereby polarizing the measurement light and reference light. Each state can be adjusted and adjusted. In this apparatus, it is assumed that the polarization states of the measurement light and the reference light are adjusted and fixed in advance.

  The spectroscope 180 includes lenses 135-8 and 135-9, a diffraction grating 181, and a line sensor 182. The spectroscope 180 is included in the base unit 951, for example. The spectroscope 180 may be included in the base unit 951 or may be included in the head unit 900. The base unit 951 may include an optical system other than the spectroscope 180.

  The interference light emitted from the optical fiber 131-4 becomes substantially parallel light via the lens 135-8, is then split by the diffraction grating 181, and is imaged on the line sensor 182 by the lens 135-9. The line sensor 182 outputs a signal based on the received light to the information processing device 925.

  Next, the periphery of the light source 101 will be described. The light source 101 is an SLD (Super Luminescent Diode) which is a typical low coherent light source. The center wavelength is 855 nm and the wavelength bandwidth is about 100 nm. The wavelength and bandwidth are not limited to these values. Here, the bandwidth is an important parameter because it affects the resolution of the obtained tomographic image in the optical axis direction. In addition, although the SLD is selected here as the type of light source, it is only necessary to emit low coherent light, and ASE (Amplified Spontaneous Emission) or the like can also be used. In view of measuring the eye, the center wavelength is preferably near infrared light. In addition, since the center wavelength affects the lateral resolution of the obtained image, it is desirable that the center wavelength be as short as possible. For both reasons, the center wavelength was set to 855 nm.

  In this embodiment, a Michelson interferometer is used as the interferometer, but a Mach-Zehnder interferometer may be used. When the difference in the amount of light between the measurement light and the reference light is relatively small, a Michelson in which the dividing unit and the combining unit are provided in common rather than the Mach-Zehnder interferometer in which the dividing unit and the combining unit are provided separately. It is preferable to use an interferometer.

  In this embodiment, SD-OCT using a center wavelength of 855 nm is used. However, SS-OCT having a center wavelength of about 1050 nm may be used. The wavelength is not limited to this value.

[Information processing apparatus 925]
The information processing device 925 is, for example, a computer, and includes a central processing unit (CPU) and a storage device. The storage device includes, for example, a memory (RAM and ROM) and a mass storage device (HDD). Part or all of the storage device may be provided outside the information processing device 925. The CPU included in the information processing device 925 executes various processes. Specifically, the CPU functions as the acquisition unit 1, the determination unit 2, and the display control unit 3 by executing a program stored in a storage device (not shown). Note that the information processing device 925 may include one or more CPUs and storage devices. That is, at least one processing device (CPU) and at least one storage device (ROM or RAM, etc.) are connected, and at least one processing device executes a program stored in at least one storage device. In this case, the information processing device 925 functions as each of the above-described means. The processing device is not limited to the CPU, and may be an FPGA or the like.

  The acquisition unit 1 acquires a moving image of the eye to be examined. Specifically, a moving image of the eye to be examined is acquired based on a signal corresponding to the return light from the eye to be output that is output from the ophthalmologic apparatus 100. For example, the acquisition unit 1 acquires a moving image of a fundus tomography based on the output of the line sensor 182, acquires a moving image of the anterior eye based on the output of the CCD 171, and acquires a moving image of the fundus based on the output of the CCD 172. Get a statue. That is, the acquisition unit 1 acquires a plurality of moving images.

  For example, the determination unit 2 determines the state of the optical head 900 with respect to the eye to be examined. Specifically, the determination unit 2 determines the alignment state of the optical head 900 with respect to the eye to be examined and the in-focus state of the measurement light emitted from the optical head 900 to the eye to be examined. That is, the determination unit 2 determines at least one of the alignment state of the measurement unit including the optical system for irradiating the measurement eye to the eye to be examined and the focus state of the measurement light on the eye to be examined. It corresponds to an example of means. The alignment of the optical head 900 with respect to the eye to be examined includes, for example, working distance adjustment.

  The determination method can be realized using various known methods. For example, the determination unit 2 determines the Z direction of the optical head 900 with respect to the subject's eye based on the shift amount of the split image of the anterior segment obtained by the image split prism that deflects the return light from the anterior segment in two different directions. It is possible to determine the alignment state. The determination unit 2 determines that the alignment has been completed, for example, when the amount of shift of the split image is equal to or less than a threshold value. The determination unit 2 can determine the alignment state of the optical head 900 with respect to the eye to be examined in the XY directions by determining whether or not the center of the pupil is at the center of the image. On the other hand, the determination unit 2 determines the in-focus state of the measurement light irradiated on the eye to be examined by evaluating the contrast of the fundus image obtained by irradiating the fundus with the measurement light, for example. For example, the determination unit 2 determines that the focusing of the measurement light applied to the eye to be examined is completed when the contrast reaches a maximum.

The display control unit 3 causes the monitor 928 to display the moving image acquired by the acquisition unit 1. For example, the display control unit 3 causes the monitor 928 to display a moving image of the anterior eye segment, a moving image of the fundus oculi, and a moving image of the fundus tomography. FIG. 2 is an example of the display screen of the monitor 928. Reference numeral 1101 denotes a moving image of the anterior segment. Here, reference numeral 1102 in the moving image 1101 of the anterior eye portion is a split image of the anterior eye portion obtained by an image split prism provided in the anterior eye observation system, and alignment (alignment) between the eye to be examined and the optical head 900 is performed. It is used when performing. Since the image split prism is disclosed in Japanese Patent Laid-Open No. 01-23134, detailed description thereof is omitted. Reference numeral 1201 denotes a fundus moving image. 1202 superimposed on the fundus moving image 1201 is an imaging range for capturing a tomographic image in the fundus image.

  Furthermore, reference numeral 1301 denotes a moving image of a fundus tomogram. The tomographic moving image is displayed at a display position based on the coherence gate position on the tomographic image display screen 1301.

  Reference numeral 1001 indicates a position of the optical head 900 in the left or right eye from a sensor (not shown). When the examiner moves the mouse on the desk or the like, the position of the cursor 1002 can be moved in conjunction with this movement. The information processing device 925 can change control such as alignment according to the position of the cursor 1002. Note that the information processing device 925 can calculate the position of the cursor 1002 from the pixel position of the cursor 1002 on the display screen. A predetermined range is provided on the display screen, and when the cursor 1002 is within the pixels in the predetermined range, the information processing device 925 performs adjustments determined in the predetermined range. For example, when the cursor 1002 is located in the moving image display area of the anterior eye part, when the user rotates the mouse wheel, the information processing device 925 receives a signal from the mouse. Then, the information processing apparatus 925 instructs a driving unit (not shown) of the ophthalmic apparatus 100 to move the optical head in the Z direction.

  When the cursor 1002 is positioned in the fundus moving image display area and the user rotates the mouse wheel, the information processing device 925 receives a signal from the mouse. Then, the information processing device 925 instructs the driving unit (not shown) of the ophthalmologic apparatus 100 to move the lenses 135-3 and 135-5 related to the SLO optical system in the optical axis direction. Further, when the cursor 1002 is positioned in the tomographic moving image display area, when the user rotates the mouse wheel, the information processing device 925 receives a signal from the mouse and drives the ophthalmologic device 100 (not shown). The mirror 132-4 is instructed to move in the optical axis direction. In this case, the manual is selected by the examiner for the alignment mode selection button 1004 on the measurement screen 1000.

Further, not only operations on the mouse wheel, but also operations such as alignment can be instructed by dragging the mouse 930 or the like. In addition, after each adjustment such as alignment is completed, the examiner presses the imaging button 1003 to perform desired imaging. A slider arranged in the vicinity of each image is used for adjustment. The slider 1203 adjusts the focus position, and the slider 1302 adjusts the coherence gate position. The adjustment of the focus position is an adjustment in which the lenses 135-3 and 135-5 are moved in the illustrated direction in order to adjust the focus on the fundus. The adjustment of the coherence gate position is an adjustment for moving the mirror 132-4 in the illustrated direction so that the tomographic image is observed at a desired position on the tomographic image display screen. These sliders move in conjunction with each other when the cursor 1002 is positioned on each image and the wheel is operated with the mouse.
Here, the coherence gate position is a position where the measurement optical path length is equal to the reference optical path length.

  The display control unit 3 changes the display form of at least one of the moving image 1101 of the anterior eye segment, the moving image 1201 of the fundus oculi, and the moving image 1301 of the fundus tomography according to the determination result by the determining unit 2. That is, the display control unit 3 corresponds to an example of a display control unit that changes the display form of the moving image displayed on the display unit according to the determination result by the determination unit and displays the moving image on the display unit.

  For example, when the determination unit 2 determines that the alignment between the eye to be examined and the optical head 900 has not been completed, the display control unit 3 displays the moving image 1101 of the anterior eye portion, the fundus oculi as shown in FIG. A moving image 1201 and a moving image 1301 of a fundus tomography are displayed on the monitor 928. When the determination unit 2 determines that the alignment between the eye to be examined and the optical head 900 has been completed, the display control unit 3 displays the moving image 1101 of the anterior eye part and the moving image of the fundus as shown in FIG. 1201 and a moving image 1301 of the fundus tomography are displayed on the monitor 928. That is, the display control means 3 changes the display screen of the monitor 928 from the state shown in FIG. 4A to the state shown in FIG. 4A and 4B are different in the display position and the size of the display area of the moving image 1101 of the anterior segment and the moving image 1201 of the fundus. Specifically, the display area of the fundus moving image 1201 is enlarged, and the display area of the anterior eye moving image 1101 is reduced. That is, when the determination unit determines that the alignment between the eye to be examined and the measurement unit is completed, the display control unit 3 enlarges the display area of the fundus moving image on the display unit. Further, when the determination unit determines that the alignment between the eye to be examined and the measurement unit is completed, the display control unit 3 enlarges the display area of the moving image of the fundus on the display unit, and the moving image of the anterior eye unit Reduce the display area.

  As can be seen from FIGS. 4A and 4B, the display control unit 3 displays the moving image of the fundus when the determination unit determines that the alignment between the eye to be examined and the measurement unit has been completed. The position of the area is changed from the position of the moving image display area of the anterior eye part to the center of the display part.

  Further, when the determination unit 2 determines that the measurement light emitted from the optical head 900 to the subject's eye is focused on the fundus, the display control unit 3 moves the moving image 1101 of the anterior segment as shown in FIG. The fundus moving image 1201 and the fundus tomographic moving image 1301 are displayed on the monitor 928. That is, the display control means 3 changes the display screen of the monitor 928 from the state shown in FIG. 4B to the state shown in FIG. In FIG. 4B and FIG. 4C, the display position and the size of the display area of the fundus moving image 1201 and the fundus tomographic moving image 1301 are different. That is, the display control means 3 changes the display form of at least one moving image of the plurality of moving images displayed on the display unit according to the determination result. Specifically, the display area of the moving image 1301 of the fundus tomography is enlarged, and the display area of the fundus moving image 1201 is reduced. That is, the display control unit 3 enlarges the display area of the tomographic moving image on the display unit when the determination unit determines that the focusing of the measurement light on the eye to be examined is completed. More specifically, when the determination unit determines that the alignment between the eye to be examined and the measurement unit is completed, the display control unit 3 enlarges the display area of the fundus moving image on the display unit and The moving image display area is reduced.

  As can be seen from FIGS. 4B and 4C, the display control unit 3 displays the tomographic moving image when the determination unit determines that the focusing of the measurement light on the eye to be examined has been completed. The position of the area is changed from the position of the display area of the fundus moving image to the center of the display unit.

  As described above, when the determination unit determines that the alignment between the eye to be examined and the measurement unit has been completed, or when it is determined that the focusing of the measurement light on the eye to be examined has been completed, Change the display format.

  The monitor 928 displays various information based on the control of the display control means 3. That is, the monitor 928 corresponds to an example of a display unit. Note that the monitor 928 may be provided separately from the information processing device 925, or may be provided integrally with a tablet or the like.

  The input unit 929 receives input from the user. For example, the input unit 929 includes at least one of a pointing device such as a mouse and a keyboard. Note that the input unit 929 may be a touch panel provided on the monitor 928.

[Processing procedure of ophthalmic system]
An example of the operation of the ophthalmic system according to the present embodiment configured as described above will be described. FIG. 3 is a flowchart illustrating an example of the operation of the ophthalmic system.
First, in step 301, shooting is started. At this stage, the display control means 3 displays at least the moving image of the anterior eye part on the monitor 928. If the fundus moving image and the fundus tomographic moving image have already been acquired, the display control unit 3 also displays these moving images on the monitor 928. An example of a screen displayed on the monitor 928 before step 304 is shown in FIG. That is, FIG. 4A is an example of a display screen of the monitor 928 before the alignment is completed. When determining the alignment state from the moving image of the anterior segment, it is not necessary to watch the moving image of the fundus as much as the moving image of the anterior segment. The image is displayed by the display control means 3 which is larger than the image display area and near the center of the display screen.

  Next, in step 302, alignment (positioning of the eye to be examined and the apparatus) is started. At this time, if the stage unit 950 includes an electric drive mechanism, the information processing device 925 determines the alignment state based on the split image of the anterior eye, and the information processing device 925 automatically has a good alignment state. Align so that If the alignment becomes good in step 303, the determination means 2 determines that the alignment is complete. If it is determined that the alignment is complete, the process proceeds to step 304. If the alignment is not good, the alignment and the determination of whether or not the alignment is completed are continued until the alignment is good. Note that not only the alignment in the Z direction but also the alignment in the XY direction may be executed in step 302. The completion of alignment is, for example, a case where the amount of deviation between the eye to be examined and the optical head 900 in the XYZ directions is equal to or less than a predetermined threshold value.

  The alignment in step 302 may be performed manually. When the alignment is performed manually, the operator operates the joystick 952 or the input unit 929 such as a mouse while referring to the moving image of the anterior eye part to move the optical head 900 to perform the alignment. Note that the completion of the alignment may be determined by the operator referring to the moving image (split image) of the anterior segment, and the determination unit 2 may determine whether the alignment is complete.

  In step 304, the display control means 3 changes the display form of the moving image displayed on the monitor 928. That is, the display control unit 3 changes the display form of the moving image displayed on the monitor 928 according to the determination result of the determination unit 2. The display form includes at least one of a moving image display area and a moving image display position.

  For example, the display control means 3 changes the display screen of the monitor 928 from the state shown in FIG. 4A to the state shown in FIG. That is, FIG. 4B is an example of the display screen of the monitor 928 after the alignment is completed. When the alignment is completed, it is only necessary to roughly know the position of the moving image of the anterior ocular segment, and it is desirable to check the fundus observation image in detail for focus adjustment. Therefore, the display control means 3 changes the size of the display area of the moving image of the anterior eye part and the size of the display area of the moving image of the fundus. Furthermore, the display control means 3 changes the display position of the moving image of the anterior eye part and the display position of the moving image of the fundus. Specifically, the display control unit 3 enlarges the display area of the moving image of the fundus that the operator pays attention to after the alignment is completed, and brings the display position closer to the center of the display screen. On the other hand, the display control means 3 reduces the display area of the moving image of the anterior eye part that is less noticed by the operator after the alignment is completed, and moves the display position away from the center part of the display screen. The display control means 3 may change only one of the change of the display area and the change of the display position. For example, it is possible to change only the size of the display area without changing the display position of the moving image of the anterior eye segment and the moving image of the fundus oculi, or the display position of the moving image of the anterior eye segment and the moving image of the fundus oculi. It is only necessary to replace the display position of. In other words, the display control unit 3 changes the size of the display area of the moving image and / or the display position as the display form, and causes the monitor 928 to perform the moving image.

  When the display screen of the monitor 928 is changed by the display control means 3, the process proceeds to step 305. In step 305, the information processing apparatus 925 performs focus adjustment between SLO and OCT. When the focus adjustment is automatically performed, the information processing apparatus 925 instructs the driving unit (not shown) to move the lens 135-3 by a predetermined distance along the optical axis direction. Thereafter, in step 306, it is determined whether or not the focus adjustment is completed. Note that the focus adjustment in step 306 may be performed manually. When manually adjusting the focus, the operator operates the input unit 929 such as a mouse while referring to the moving image of the anterior eye part to move the lens 135-3 to perform alignment. Note that the completion of focus adjustment may be determined by the operator with reference to a fundus moving image, or the determination of completion of focus adjustment may be performed by the determination unit 2.

  In step 306, the determination unit 2 determines whether or not focus adjustment has been completed. That is, the determination unit 2 determines the focus state of the measurement light on the eye to be examined. For example, when the maximum value of the contrast of the moving image of the fundus is detected, the determination unit 2 determines that the focus adjustment has been completed, and the process proceeds to step 307. When the determination unit 2 determines that the focus adjustment is not completed, the process returns to step 305 and the focus adjustment is performed again.

  In step 307, the display control means 3 changes the display form of the moving image displayed on the monitor 928. That is, the display control unit 3 changes the display form of the moving image displayed on the monitor 928 according to the determination result of the determination unit 2. For example, the display control means 3 changes the display screen of the monitor 928 from the state shown in FIG. 4B to the state shown in FIG. That is, FIG. 4C is an example of the display screen of the monitor 928 after the focus adjustment is completed. When the focus adjustment is completed, a tomographic moving image that is an image to be finally captured is more important than a fundus moving image. Therefore, the display control unit 3 changes the size of the display area of the fundus moving image and the size of the display area of the tomographic moving image. Further, the display control means 3 changes the display position of the fundus moving image and the display position of the tomographic moving image. Specifically, the display control unit 3 enlarges the display area of the moving image of the tomographic image that the operator pays attention to after the focus adjustment is completed, and brings the display position closer to the center of the display screen. On the other hand, the display control unit 3 reduces the display area of the moving image of the fundus that is less noticed by the operator after the alignment is completed, and moves the display position away from the center of the display screen. The display control means 3 may change only one of the change of the display area and the change of the display position. For example, only the size of the display area may be changed without changing the display position of the fundus moving image and the tomographic moving image, or only the display position may be changed without changing the display area size. But you can. That is, the display control unit 3 changes at least one of the change in the size of the display area and the change in the display position, and causes the monitor 928 to perform the moving image.

  Next, in step 308, the information processing device 925 adjusts the polarization of at least one of the measurement light and the reference light. In step S308, the information processing device 925 adjusts the amount of reference light. These adjustments may be automatic or manual.

  In step 309, the information processing apparatus adjusts the coherence gate position. This adjustment may be automatic or manual.

  Proceeding to step 310, the information processing apparatus 925 determines whether or not the adjustments of steps 308 and 309 have been completed. If not completed, the process returns to step 308 to continue the adjustment until the adjustment is completed. If the information processing device 925 determines that the adjustment in steps 308 and 309 has been completed, the process proceeds to step 311.

  In step 311, acquisition of tomographic images is started. The acquisition of the tomographic image may be automatic, or the acquisition of the tomographic image may be started based on an imaging instruction input from the operator via the input unit or the like.

  When the acquisition of the tomographic image is completed, the process proceeds to step 312 and the photographing is finished.

  According to the present embodiment described above, it is possible to change the display form of the moving image displayed on the monitor 928 based on the state of the apparatus with respect to the eye to be examined such as alignment or focus adjustment. That is, information can be appropriately displayed on the display unit according to the state of the apparatus with respect to the eye to be examined. Therefore, the operator can comfortably perform alignment or focus adjustment.

  FIG. 4A shows an example of a display screen when the optical head 900 is moved. However, since adjustment of the focus and coherence gate and photographing are rare while moving the optical head 900, adjustments necessary for these are performed. The slider and the imaging button are not displayed. The display control unit 3 can widen the available screen area by preventing unnecessary adjustment sliders and imaging buttons from being displayed on the monitor 928. In FIG. 4A, a slider for adjusting the focus and coherence gate and a photographing button may be displayed. On the other hand, in FIG. 4B, an adjustment slider and a shooting start button may be displayed on the screen for focus adjustment and shooting start. Note that the button for tomography may not be displayed on a screen other than that shown in FIG.

  In FIG. 4A, the display control unit 3 displays the moving image of the tomography on the monitor 928, but the operator pays attention to other moving images rather than the moving image of the tomography at the stage of alignment adjustment. Therefore, the moving image of the tomogram may not be displayed.

  Further, in FIG. 4B, the display control means 3 displays the moving image of the anterior segment on the monitor 928. However, the operator is not able to move the moving image other than the moving image of the anterior segment at the stage of focus adjustment. In order to focus on the image, the moving image of the anterior segment may not be displayed.

  In FIG. 4C, the display control means 3 displays the moving image of the anterior segment on the monitor 928. However, the operator can select other moving images than the moving image of the anterior segment at the coherence gate adjustment stage. In order to focus on the moving image, the moving image of the anterior segment may not be displayed.

  Note that if there is a moving image that is not displayed, the light source corresponding to the image that is not displayed by the information processing device 925 or the power supply of the CCD can be cut off to reduce power consumption and extend the life.

(First modification)
In the above example, the display control unit 3 changes the display screen of the monitor 928 in step 304 and step 307, but the present invention is not limited to this.

  For example, only one of step 304 and step 307 may be executed.

(Second modification)
In the above embodiment, it has been described that the determination unit 2 determines the alignment state from the split image of the moving image of the anterior segment, but the present invention is not limited to this. For example, when the optical head 900 and the eye 107 to be inspected are manually aligned, the optical head is not moved after the normal alignment is completed. Therefore, the determination unit 2 may detect the movement amount of the optical head 900 and determine that the alignment is completed by determining the movement amount. Note that the movement amount may be detected by a physical sensor such as an acceleration sensor, an angular velocity sensor, an encoder provided in the drive unit, or may be calculated from a feature point of a photographed fundus image. Alternatively, some threshold values may be provided for the movement amount value, and the ratio of the display area of the anterior segment moving image, fundus moving image, and tomographic moving image may be changed for each movement amount. For example, the display control unit 3 may enlarge the fundus moving image display area and reduce the anterior eye moving image display area as the movement amount of the optical head 900 decreases.

(Other embodiments)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

DESCRIPTION OF SYMBOLS 1 Acquisition means 2 Judgment means 3 Display control means 925 Personal computer 928 Monitor

Claims (13)

An acquisition means for acquiring a moving image of the eye to be examined;
Determination means for determining at least one of a state of alignment of a measurement unit including an optical system for irradiating the eye to be examined with measurement light with respect to the eye to be examined and a state of focusing the measurement light on the eye to be examined;
Display control means for changing the display form of the moving image displayed on the display section and displaying the display section on the display section according to the determination result by the determination section;
A display control apparatus comprising:   The display control apparatus according to claim 1, wherein the display control unit changes at least one of a size and a display position of a display area of the moving image as the display form.   The display control unit is configured to display the display when the determination unit determines that the alignment between the eye to be examined and the measurement unit is completed, or when the focus of the measurement light on the eye to be examined is completed. The display control apparatus according to claim 1, wherein the form is changed. The acquisition means acquires a plurality of moving images,
4. The display control unit according to claim 1, wherein the display control unit changes the display form of at least one moving image of the plurality of moving images displayed on the display unit according to the determination result. The display control apparatus according to item 1. The plurality of moving images are a moving image of the anterior segment and a moving image of the fundus.
The display control means enlarges the display area of the fundus moving image on the display section when the determination means determines that the alignment between the eye to be examined and the measurement section is completed. Item 5. The display control device according to Item 4.   When the determination unit determines that the alignment between the eye to be examined and the measurement unit is completed, the display control unit expands a display area of the moving image of the fundus on the display unit, and the anterior eye unit The display control apparatus according to claim 5, wherein the display area of the moving image is reduced.   When the determination unit determines that the alignment between the eye to be examined and the measurement unit has been completed, the display control unit determines the position of the moving image display region of the fundus to display the moving image display region of the anterior eye unit The display control device according to claim 5, wherein the display control device changes from the position of the display to the center of the display unit. The plurality of moving images are a fundus moving image and a fundus tomographic moving image,
The display control means enlarges the display area of the tomographic moving image on the display unit when the determination means determines that focusing of the measurement light on the eye to be examined has been completed. Item 5. The display control device according to Item 4.   When the determination unit determines that the alignment between the eye to be examined and the measurement unit is completed, the display control unit expands a display area of the moving image of the fundus on the display unit, and the anterior eye unit The display control apparatus according to claim 8, wherein the display area of the moving image is reduced.   The display control means determines the position of the moving image display area of the tomographic image as the position of the moving image display area of the fundus when the determining means determines that the focusing of the measurement light to the eye to be examined has been completed. The display control apparatus according to claim 8, wherein the display control device is further changed to the center of the display unit. The acquisition means acquires a moving image of the anterior segment, a moving image of the fundus, and a moving image of the tomogram of the fundus.
The display control unit displays at least one moving image of the anterior segment moving image, the fundus moving image, and the tomographic moving image displayed on the display unit according to the determination result by the determining unit. The display control apparatus according to claim 2, wherein at least one of the size of the area and the display position of the display area is changed. An acquisition step of acquiring a moving image of the eye to be examined;
A determination step of determining at least one of an alignment state of a measurement unit including an optical system for irradiating measurement light to the eye to be examined and an in-focus state of the measurement light to the eye to be examined;
In accordance with the determination result in the determination step, a display control step of changing the display form of the moving image displayed on the display unit and causing the display unit to display the display form,
A display control method comprising:   A program for causing a computer to execute the display control method according to claim 12.

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